The 18-year-old, a Manchester United fan, got a frosty reception at the Utilita Arena for night eight of this season's Premier League on Thursday, but laughed off the light-hearted jeers from the home crowd and then soon got the fans on side as he stormed to yet another victory, his fourth of the campaign.
Littler said he was braced for the boos but the world champion was cheering with Newcastle's fans when the Magpies beat Liverpool at Wembley a couple of weeks ago.
"I watched the final, it was good," he revealed afterwards.
"Obviously as a United fan you never want Liverpool or Man City winning!"
And Littler appeared to have Newcastle's players on side on Thursday night. Dan Burn, Kieran Trippier, Harvey Barnes and Sean Longstaff were all in attendance, and Littler said: "I've seen a clip of Dan Burn, he was loving my walk-on!"
Littler's rivals aren't loving the teenager's dominance right now.
The Premier League reached the halfway stage on Thursday night but Littler already looks away and gone at the top - he's eight points clear - and the other seven players are battling for three spots to join him on finals night.
It's four wins from eight weeks and six finals for Littler, who dropped only four legs all night, whitewashing Stephen Bunting before comfortably seeing off Rob Cross and Luke Humphries.
Humphries is number one in the world rankings but there's no doubting the best player on the planet on current form.
"I never really say I'm the best in the world but I'm performing better than these guys so maybe I should say I am," admitted Littler.
"For myself, when I'm playing certain players, I know when I've got them!"
Is, then, Littler at the stage where his rivals don't believe they can beat him?
"It's darts," he said.
"It's a strange old game, anyone can turn up and hit the 105, 110 averages."
Bunting - who is still winless and bottom - averaged almost 103 in his quarter-final clash against Littler on Thursday night but didn't win a leg. Littler only averaged 97 and 93 in his semi-final and final but never looked like losing. Even though he was, in his own words, "shattered" come the final.
The next target for Littler is becoming the first player to ever notch five nightly wins since the Premier League format was changed.
"I want to finish top," he said.
"I think I'm two clear now on the rest of the lads who have won. The goal now is to win the fifth then we'll see what happens next.
"I'm feeling well. Tonight I was tired but it's all about making sure you're right and you can get up on stage and play these games."
Chris Dobey was in the crowd at Wembley a couple of weeks ago and returned to Tyneside for his homecoming still "buzzing" from Newcastle's Carabao Cup success.
A week ago in Cardiff, Dobey received a FaceTime call from Newcastle's players who were out in Dubai.
How Dobey would love to have given Newcastle's players and fans a home winner on Thursday night.
But the 34-year-old's night was ended prematurely by Humphries, who beat Hollywood 6-3 and then averaged 106.7 but still needed to hold his nerve in a last leg decider to beat Nathan Aspinall in the semi-final.
Michael van Gerwen was victorious last year in Newcastle but a repeat was never on the cards, with the three-time world champion sent packing by Nathan Aspinall at the quarter-final stage.
Rob Cross beat Gerwyn Price in the other quarter final before suffering the misfortune of bumping into Littler in the semi-final.